Combined carpenter&#39;s square and miter-gage.



APPLICATION FILED OCT-21.1916.

Patented May 15, 1917.

in they art to which it appertains to make Y thereof.

"ran CLARENCE F. BENJAMIN, OF MILFORD, CONNECTICUT.

COMBINED canrnnrnn's sevens AND MITEB-GAGE.

Specification of Letters Patent.

Patented May is, rare.

Application filed October 21, 1916. Serial No. 126,948.

To all whom it may concern Be it known that I, CLARENCE F. BENJA- MIN, a citizenof the United States, residing at the town of Milford, county of New Haven, State of Connecticut, have invented certain new and useful Improvements :in Comblned Carpenters Squares and Miter- Gages; and I do declare the following to be a full, clear,'and exact description of the invention, such as will enable others skilled and use the same.

This lnventlon relates to certain new and useful improvements in a combined carpenters square and miter gage and more particularly to an improvement on the 1nvention shown and described in my application filed April 17, 1916, Serial No. 91,532.

Inmy prior construction which embodied spaced plates and interfolding blades it was necessary to take hold of the blades to open them from between the plates, such operation being bothersome and difficult.

With the present invention, the mainobject is to provide a square, and miter gage of simplifiedconstruction which will operate in a more efficient and facile manner.

Further, the invention resides in an improved lock for holding the blades related at a predetermined angle and certain other features of construction, arrangements and combination of partshereinafter fully described and succinctly defined, the preferred in the accompanying drawingwherein,

Figure 1 is a front elevation of the combined square and miter gage partly opened; and" Fig. 2 is a longitudinal section thereof. Referring more in detail to the drawing,

the numeral 1 designates the main or central body part, and 2 and 3 the end blades which are swingingly connected to the opposite end portions of the body part or portion 1 for folding over the oppositefsl'de faces The pivotal connection between body 1 and blade 3 consists of a headed pin- 4 countersunk in the blade 3 and having a.-

embodiment of the invention being depicted threaded end "protruding through the oppo- 'si'te face of body 1 to receive a win ed nut 5 by the adjustment of which the said blade may be fixedly related.

The body 1 and blade 2 are pivotally connected by a stud or nut 6 and a screw 7 between which latter and the opposing face of blade 2 is interposed a bowed, starshaped spring 8. A concentric series of teeth 9 are formed on the inner face of blade 2 for interlocking with a like series of teeth or notches 10 provided in the 0pthrough the body .1 and the tubular shank passing entirely through the blade 2 and internally threaded to receive the screw 7.

By proper adjustment of the'latter, the desired tension may be placed upon the spring 8 for effecting more or less friction between the teeth 9 and 10. i

The free end of blade 2 is provided with a cut-out 12 adapted to embrace the screw 4 and nut 5 for holdingsaid blade against movement from folded position. When the two blades are folded in closed relation, it will be noted that the free end ofblade 3 .overlaps the stud 6 to serve as a stop against accidental displacement of said stud.

.An exceedingly simplified and practical structure is obvious, therefore, in which the operator merely grasps blade 2 and swings it to the-desired position, the teeth 9 rising resiliently from the notches 10 to permit of such movement. The teeth will then reseat themselves in other notches identifying the determined adjustment. By proper tensioning of the spring 8, the blade will not swing too stifliy but will move with little exertion.

What is claimed is p 1. In an instrument .of the character described, a main body plate, ablade pivoted 1 to one end of said plate, said pivotal connection consisting of a headed stud countersunk within said plate'and having its end internally' threaded, a headed screw engaged in -the threaded end of the stud, and a bowed spring interposed between the screw head and the adjacent blade. r

2. In aninstrument of the character described, a main body plate, a blade pivoted to one end of said plate,said pivotal connection consisting of a headed stud countersunk;-

within said plate and having its end inter nally threaded, a headed screw engaged in the threaded end of the stud, a bowed spring interposed between the screw head and the adjacent blade, and a second blade pivoted to the opposite end of the opposing face of said plate and adapted in closed position to engage over the head of the stud.

3. In an instrument of the character described, a main body plate, a blade pivoted tooneend of s aidplate, said pivotal connection consisting of a headed stud counterblade to'the main blade and constituting a pivotal connection between the latter and the second blade. I

4. In an instrument of the character described, a main body plate having foldable blades pivoted to'the opposite faces of said plate and at opposite ends thereof, the pivotal point of one of said blades consisting of a stud and an engaging screw having a head, said blade and plate having on their contacting faces circular series of concentric spaced interengaging teeth and notches, and a spring element interposed between said head and blade to effect the resilient engagement of said teeth and notches.

5-. In an instrument of the character described, a main body plate, a blade, a stud countersunk within said plate and extending freely through said blade and acting as a pivot therefor, said blade and plate having interengaging teeth and notches, a headed screw engaging said stud, and a spring element encircling said screw and confined between the head thereof and said blade, whereby a friction is imposed between said blade and plate with said teeth and notches resiliently engaged.

In testimony whereof I affix my signature in presence of two witnesses.

CLARENCE F. BENJAMIN. 

